- Notebook battery
- 1 x lithium ion 9-cell 8400 mAh
- for Lenovo ThinkPad T520i
Need a battery for Lenovo-IBM Laptops/Notebooks with the following model numbers: ThinkPad T410, T410i, T420, T420i, T510, T520, T520i, W510, W520; L series; SL410, SL420; Edge E40, E50, 14, 15 (9-cells)? BTI has you covered with our premium 9 cell LiIon battery. This product has been engineered to meet or exceed the original manufacturer's specifications and replaces the original Lenovo-IBM part numbers 42T4799, 42T4801, 42T4802, 42T4803, 42T4853, 57Y4186, Battery 55++. All BTI batteries are manufactured and tested under our stringent quality standards and come with an industry leading 18 month manufacturer's warranty. BTI... True to the original.